As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: LEFT AFT LAVATORY DOOR LOCK GETS STUCK WHEN IN THE LOCKED POSITION. VERY DIFFICULT TO UNLOCK ONCE LOCKED. APPLIED LUBRICATION TO AFT LAVATORY DOOR LOCK HINGES, PERFORMED OPERATIONAL TEST OF DOOR LOCK. OPERTIONAL CHECK GOOD. PER CMM 52-50-00.